DRUM M329 – 450A (01) PDF Document

An indicator is built into the DRUM M329 – 450A filter assembly and is activated by a pressure difference within the filter as the element becomes restricted. The operation is as follows:

1. Normal Operation: The indicator window normally displays a green sleeve when the element is functioning correctly.

2. Contamination: As the filter becomes contaminated, the green sleeve will move upwards, allowing the red indicator sleeve to come into view.

3. Service Required: The indicator will show fully red when the pressure difference reaches 200 mBar. It is recommended that the filter element is cleaned as soon as the red sleeve appears, as a drop in air delivery pressure will occur.

The performance data for the DRUM M329 series filters are as follows:

Model: M329 – 200 (200mm Element)

• Maximum safe Working Pressure = 2.5 bar
• ΔP at 200m³/hr = 75 mBar at 0 Bar
• ΔP at 200m³/hr = 50 mBar at 2 Bar
• Weight = 4.4 Kg
• Required clearance to remove bowl = 220mm

Model: M329 – 300A (300mm Element)

• Maximum Safe Working Pressure = 2.0 bar
• ΔP at 500m³/hr = 50 mBar at 0 Bar
• ΔP at 500m³/hr = 25 mBar at 2 Bar
• Weight = 8.9kg
• Required clearance to remove bowl = 220mm

Model: DRUM M329 – 450A (450mm Element)

• Maximum Safe Working Pressure = 2.0 bar
• ΔP at 1000m³/hr = 35 mBar at 0Bar
• ΔP at 1000m³/hr = 20 mBar at 2 Bar
• Weight = 10.8 Kg
• Required clearance to remove bowl = 220mm

When the clogging indicator has started to turn red, the filter element will have to be cleaned. Follow these steps to remove it:

1. Before any attempt can be made to remove the filter element, any air in the system must be vented from the filter by opening the ball valve (15) located at the base of the filter bowl.

2. Release the filter bowl (14) by rotating the release knob (1). Ensure the filter bowl is supported.

3. Remove the Filter Bowl, taking care not to damage the seal (3).

4. Extract the element (5) complete with the two support seals (4) and (6).

5. Inspect the seals for damage and replace if necessary.

6. Extract the filter bowl seal from the filter body, inspect for damage and replace if necessary.

It is recommended that the filter element be ultrasonically cleaned. If you do not have access to such equipment, please follow the procedure outlined below:

1. Immerse the filter element into a suitable receptacle filled with hot soapy water / commercial detergent and remove any contaminants by agitating and rotating the element.

2. When the element has been cleaned, it is advisable to repeat the process in clean water and thoroughly rinse until all traces of detergent have been removed. By using a high pressure water jet or steam pressure lance working from the inside outwards, the same effect can be achieved. The element should be dried, preferably using a compressed air line again blowing from the inside outwards.

3. Visually inspect the element after cleaning for any remaining contaminants and repeat the cleaning procedure if necessary. The filter element should also be checked for any damage to the pleated media. If in doubt, DO NOT use it and replace it with a new unit.

*Note: When replacing a Filter Element, it is recommended that both the part number and the filtration rating are quoted. These items can be found on a plate attached to the element.

*Note: When replacing a Filter Element, it is recommended that both the part number and the filtration rating are quoted. These items can be found on a plate attached to the element.